CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands |
Jun. 30, 2018 |
Mar. 31, 2018 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Trade accounts receivable, allowances | $ 9,742 | $ 33,462 |
| Inventory reserves | 8,584 | 9,020 |
| Accumulated depreciation | 217,353 | 210,763 |
| Accumulated amortization | $ 67,413 | $ 66,065 |
| Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
| Common stock, authorized shares (in shares) | 125,000,000 | 125,000,000 |
| Common stock, issued shares (in shares) | 30,369,000 | 30,447,000 |
| Common stock, outstanding shares (in shares) | 30,369,000 | 30,447,000 |